Solar Heat Sensitive Automatic Greenhouse Vent Opener Auto Greenhouses Roof

Features:
When temperature above 25 /77 F, the window opener will keep opening.Fully open temperature at 30 (86 F) or above; once temperature drop to about 15 /59 F, the window opener will totaly close.
Uses solar energy, open or close the greenhouse vents as temperature rises or drops
This opener will automatically open and close your greenhouse window, as the temperature changes automatically, maintains the best growing temperature and prevents your greenhouse from overheating.
Do not apply excessive loads by locking or covering window.The automatic ventilation window opener in the greenhouse cannot be used in an environment with a temperature higher than 50

Specifications:
Material: Aluminum
Size: As the photo shows

Note:
Other items in the pictures are not included.
Different displays show the same picture may be slightly differences.

What's in the box
1xGreenhouse Vent Opener